Real-Time Two-Dimensional Imaging of Potassium Ion Distribution Using an Ion Semiconductor Sensor with Charged Coupled Device Technology

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Abstract

Two-dimensional real-time observation of potassium ion distributions was achieved using an ion imaging device based on charge-coupled device (CCD) and metal-oxide semiconductor technologies, and an ion selective membrane. The CCD potassium ion image sensor was equipped with an array of 32 × 32 pixels (1024 pixels). It could record five frames per second with an area of 4.16 × 4.16 mm<sup>2</sup>. Potassium ion images were produced instantly. The leaching of potassium ion from a 3.3 M KCl Ag/AgCl reference electrode was dynamically monitored in aqueous solution. The potassium ion selective membrane on the semiconductor consisted of plasticized poly(vinyl chloride) (PVC) with bis(benzo-15-crown-5). The addition of a polyhedral oligomeric silsesquioxane to the plasticized PVC membrane greatly improved adhesion of the membrane onto Si<sub>3</sub>N<sub>4</sub> of the semiconductor surface, and the potential response was stabilized. The potential response was linear from 10<sup>−2</sup> to 10<sup>−5</sup> M logarithmic concentration of potassium ion. The selectivity coefficients were <i>K</i><sub>K<sup>+</sup>,Li<sup>+</sup></sub><sup>pot</sup> = 10<sup>−2.85</sup>, <i>K</i><sub>K<sup>+</sup>,Na<sup>+</sup></sub><sup>pot</sup> = 10<sup>−2.30</sup>, <i>K</i><sub>K<sup>+</sup>,Rb<sup>+</sup></sub><sup>pot</sup> =10<sup>−1.16</sup>, and <i>K</i><sub>K<sup>+</sup>,Cs<sup>+</sup></sub><sup>pot</sup> = 10<sup>−2.05</sup>.

Journal

  • Analytical Sciences

    Analytical Sciences 26(10), 1039-1045, 2010-10-10

    The Japan Society for Analytical Chemistry

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Codes

  • NII Article ID (NAID)
    10026785579
  • NII NACSIS-CAT ID (NCID)
    AA10500785
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    09106340
  • NDL Article ID
    10838016
  • NDL Source Classification
    ZP4(科学技術--化学・化学工業--分析化学)
  • NDL Call No.
    Z54-F482
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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